ROTARY SEALS OS-N21 /

Description:

Pressure loadable radial shaft seal
Elastomer-coated OD, flat
Short spring-loaded sealing lip
Protective lip against entry of contamination from outside (dust, dirt,...)

Special features:

Pressure loadable due to special sealing lip design
Reliable static sealing inside housing
For housings with high thermal expansion, e.g., light
metal housing
For split housings
For housings with increased surface roughness
For sealing thin-body and gaseous media
No risk of fretting corrosion
Efficient protection against air side contaminations

Applications e.g.:
Rotating / pressurized applications
Pressurized units such as pumps or hydraulic
motors

Materials:
Standard material
Elastomer NBR 80 blue
Spring Spring steel according to
DIN EN 10270-1
Metal case Carbon steel according to
DIN EN 10139
Special materials : Elastomer FKM / Silicon / ACM / HNBR / CR / EPDM
Spring Stainless steel 1.4301
Metal case Stainless steel 1.4301

Application parameters for the standard materials combination:
Temperature -40°C to +100°C
Pressure acc. to table „Operating parameters for rotary shaft seals“
Shaft speed acc. to chart „Operating parameters for rotary shaft seals“
Media Mineral oil based lubricants, synthetic lubricants. When synthetic lubricants are used for which there is no empirical experience, test the compatibility in the laboratory or - better even - in practical trials.
The operating temperature should not exceed 80°C.

Design information:
Shaft :
Tolerance ISO h11
Hardness min. 45 HRC
Roughness Ra = 0.2 - 0.8 μm
Rz
= 1 - 5 μm
Rmax ≤ 6.3 μm
Surface finish free of orientation (lead free)

Housing bore:
Tolerance ISO H8
Roughness Ra = 1.6 - 6.3 μm
Rz
= 10 - 20 μm
Rmax ≤ 25 μm

Installation:
Please read our installation instructions.